73161145 has 8 divisors (see below), whose sum is σ = 88016904. Its totient is φ = 58379904.

The previous prime is 73161139. The next prime is 73161163. The reversal of 73161145 is 54116137.

It can be written as a sum of positive squares in 4 ways, for example, as 14500864 + 58660281 = 3808^2 + 7659^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73161145 - 2¹⁷ = 73030073 is a prime.

It is a super-2 number, since 2×73161145² = 10705106275422050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16444 + ... + 20413.

It is an arithmetic number, because the mean of its divisors is an integer number (11002113).

Almost surely, 2^73161145 is an apocalyptic number.

It is an amenable number.

73161145 is a deficient number, since it is larger than the sum of its proper divisors (14855759).

73161145 is a wasteful number, since it uses less digits than its factorization.

73161145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37259.

The product of its digits is 2520, while the sum is 28.

The square root of 73161145 is about 8553.4288446213. The cubic root of 73161145 is about 418.2412185699.

The spelling of 73161145 in words is "seventy-three million, one hundred sixty-one thousand, one hundred forty-five".